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A nocturnal mission with the water bailiffs of the River Nith, hot on the trail of salmon poachers.

Bothy ballads. Euan McIlwraith listens in on a rich agricultural tradition that goes back hundreds of years. But will it survive another generation?

Learning to recognise birds through song.

Mark Stephen discovers a city's secrets on a tour of hidden Aberdeen.

Leaf science. Why are the autumnal colours so strikingly vivid this year?

The four men who met in a prisoner-of-war camp who went on to become the founding fathers of British conservation.

Plus, why a small bridge in the Campsie Fells could become a national crossroads.

And how mountaineering and hill running influences the music of composer, Matilda Brown.